var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const session = require('express-session');
const {DBHOST,DBPORT,DBNAME} = require('./config/config');
const  mongoStore = require('connect-mongo');


var pageRouter = require('./routes/page');
var dataRouter = require('./routes/data');
var authRouter = require('./routes/auth');

var app = express();

// session 初始化  位置必须在首位 
app.use(session({
  name : 'aid',
  secret: 'baidu',
  saveUninitialized : false ,
  resave : true,
  store : mongoStore.create({
      mongoUrl : `mongodb://${DBHOST}:${DBPORT}/${DBNAME}`
  }),
  cookie : {
      httpOnly : true,
      maxAge : 1000 * 300 
  }
}));



// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', pageRouter);
app.use('/api', dataRouter);
app.use('/', authRouter);


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  res.render('404');
});


// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
